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Double Ribbom Screw Mixer with side outlet is suitable for direct bagging from mixer and where mixer is normally installed at ground floor level.

These mixers consists of U-shaped horizontal trough in which a heavy duty shaft with two ribbons in helix shape at different pitch circle diameter are mounted with the help of arms.
The ribbon helix is so shaped that when inside mixing shaft rotates, one ribbon pushes the material in one side while at same time other ribbon pushes the material opposite side.
So, particles inside the mixer are given very fast movement and homogenous mix is achieved.
Lark Engineering introduces smart double ribbon screw mixers with its patented ( Pending ) world advanced ribbon design which can perform mixing at much faster rate using minimum of power.
Our Patented Design

Double ribbon screw mixer is being manufactured in this world from the last many decades with common design features of inner and outer blades. One or more of following problems are generally faced in these designs:

  1. Bending of ribbon and arms particularly near to side walls.
  2. Excessive product heating.
  3. Longer mixing time.
  4. More power per ton of mixing.
  5. Mixing not up to the mark.

In our patented design, both outer and inner ribbons are having variable cross-section area i.e., wider at the start of the ribbon and narrower at the end, both ribbons are having end relief.
With these modifications, we have achieved following results:-

  1. Breakage and bending of ribbons completely eliminated.
  2. Very less heat is generated.
  3. Mixing Efficiency: Due to the usage of much wider blades, more pitch of blades, higher rpm, and the mixing efficiency of these mixers is the highest in its class world over.

For achieving same mixing result on any other mixer in its class it will at least save 25-35% of time, similarly at least 25-35% power is saved.

Salient features
Mixing Ribbons are specially designed for efficient mixing and have resistance to   bend under various forces on load.
Our mixers are fitted with well designed heavy duty helical type gear box which gives long trouble free life and is highly energy efficient.
Large service window provided for easy access to inside of mixing drum for cleaning and maintenance.
Service window at bottom also provided for complete clean out of mixer.
For higher capacity plants where mixer is installed at some height and have surge bin below it, for fast discharge, mixer is fitted with double outlet at bottom.
Line Diagram
Technical Specifications & Dimensions
Drum Volume
Working Volume
Power in H.P
Capacity for feed in kgs with 18kg/cuft All Over Dimensions Approx. Weight in kgs.( without Motor) Volume seaworthy packing Cu.m.
  Cu.ft Ltr Cu.ft Ltr A B C
500 2150 880 1200 800 4.4
1000 2380 1145 1550 1400 7
2000 3030 1480 1730 2685 12
3000 3700 1550 1955 3900 16.7
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